how to calculate gst for packaging material when we sale any goods (crockery item) with packing

Amit Kumar (i want to improve my taxation.)   (136 Points)

07 July 2019  
dear respected sir/madem,
I am thinking to start a new business (Trading). but I have a confusion.
my query is - how to calculate gst for packaging material when we sale any goods (crockery item) with packing (Cartoons)????